Tray assembly, battery pack, electric device, and vehicle

Abstract

A tray assembly (2100), a battery pack, an electric device, and a vehicle. The tray assembly (2100) comprises: a tray (201), the tray (201) having an accommodating cavity, and the accommodating cavity being used for accommodating a battery; an explosion-proof valve (2), the explosion-proof valve (2) being arranged on the tray (201) and used for guiding high-temperature gas in the tray (201) to the outside; and a cover body (3), the cover body (3) covering the explosion-proof valve (2), air holes (30) being formed in the cover body (3), and the air holes (30) being used for changing the exhaust direction, so as to enable the discharged high-temperature gas to avoid the tray (201) and / or a safety device on a vehicle body, thereby improving safety.

Description

Pallet assemblies, battery packs, electrical devices and vehicles

[0001] CROSS-REFERENCE TO RELATED APPLICATIONS

[0002] This application claims priority to Chinese patent application No. 202311266485.4 filed by BYD Co., Ltd. on September 25, 2023, entitled “Tray assembly, battery pack, electrical device and vehicle” and Chinese patent application No. 202311250536.4 filed on September 25, 2023, entitled “Battery case, battery pack and electrical equipment”, the entire contents of which are incorporated by reference into this application. Technical Field

[0003] The present application relates to the field of battery technology, and in particular to a tray assembly, a battery pack, an electrical device and a vehicle. Background Art

[0004] Currently, battery packs are widely used in vehicles as power modules. Accordingly, battery packs need to have long life and high safety requirements to meet the needs of modern consumers for electric vehicles.

[0005] In the related art, the battery pack has safety hazards due to the unreasonable structural design of the battery pack.

[0006] Application Contents

[0007] The present application aims to solve one of the technical problems in the related art at least to a certain extent.

[0008] To this end, the present application proposes a tray assembly.

[0009] The tray assembly according to the present application includes: a tray, the tray having a accommodating cavity, the accommodating cavity being used to accommodate batteries; an explosion-proof valve, the explosion-proof valve being arranged on the tray and being used to discharge the high-temperature gas in the tray to the outside; a cover body, the cover body being arranged on the explosion-proof valve, and the cover body being provided with air holes, the air holes being used to change the exhaust direction so that the discharged high-temperature gas avoids the safety devices on the tray and / or the vehicle body.

[0010] According to the tray assembly of the embodiment of the present application, the high-temperature gas is guided through the air holes so that the discharged high-temperature gas can avoid the safety devices, thereby improving the explosion-proof safety of the battery pack.

[0011] The present application also proposes a battery pack, which includes the above-mentioned tray assembly.

[0012] The present application also provides an electrical device, which includes the above-mentioned battery pack.

[0013] The present application also proposes a vehicle, which includes a battery pack and a second safety device, and the battery pack includes the above-mentioned tray assembly, the second safety device is installed on the vehicle body and arranged adjacent to the battery pack, and the opening direction of the air hole is suitable for avoiding the second safety device.

[0014] Additional aspects and advantages of the present application will be given in part in the description below, and in part will become obvious from the description below, or will be learned through practice of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] FIG1 is a partial schematic diagram of a tray assembly according to an embodiment of the present application;

[0016] FIG2 is an exploded view of a tray assembly according to an embodiment of the present application;

[0017] FIG3 is a schematic structural diagram of a cover according to an embodiment of the present application;

[0018] FIG4 is a schematic diagram of the cooperation between the tray assembly and the second safety device according to an embodiment of the present application;

[0019] FIG5 is a front view of a tray assembly according to one embodiment of the present application;

[0020] FIG6 is a side view of a tray assembly according to one embodiment of the present application;

[0021] FIG7 is a schematic structural diagram of a fixing block in a tray assembly according to one embodiment of the present application;

[0022] FIG8 is a schematic structural diagram of a fixing hole in a tray assembly according to one embodiment of the present application;

[0023] FIG9 is a top view of a tray assembly according to one embodiment of the present application;

[0024] FIG10 is a cross-sectional view taken along line AA in FIG5 . DETAILED DESCRIPTION

[0025] The following describes in detail embodiments of the present application, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present application, and should not be construed as limiting the present application.

[0026] First, it should be noted that this application is based on the aforementioned priority documents. Therefore, the terminology of the aforementioned priority documents has been unified. Specifically, the "tray assembly" in priority document "202311266485.4" and the "battery case" in priority document "202311250536.4" are the same component and are collectively named "tray assembly"; the "tray" in priority document "202311266485.4" and the "case body" in priority document "202311250536.4" are the same component and are collectively named "tray"; the "accommodation cavity" in priority document "202311266485.4" and the "cavity" in priority document "202311250536.4" are the same component and are collectively named "accommodation cavity." The following describes a tray assembly 2100 according to an embodiment of the present application with reference to Figures 1-4. The tray assembly 2100 is applied to a battery pack to carry batteries.

[0027] According to the tray assembly 2100 of the present application, it includes: a tray 201, an explosion-proof valve 2 and a cover body 3. The tray 201 has a accommodating cavity for accommodating batteries. The explosion-proof valve 2 is arranged on the tray 201, and the explosion-proof valve 2 is used to discharge the high-temperature gas in the tray 201 to the outside to prevent the internal pressure of the battery pack from being too high and the temperature from being too high.

[0028] The air inlet 21 of the explosion-proof valve 2 is connected to the accommodating chamber, the exhaust port 22 of the explosion-proof valve 2 is connected to the outside of the tray 201, and the cover 3 is provided on the explosion-proof valve 2 to protect the explosion-proof valve 2 through the cover 3.

[0029] The cover body 3 is provided with air holes 30 , which are used to change the exhaust direction so that the exhausted high-temperature gas avoids the tray 201 and / or safety devices on the vehicle body.

[0030] The safety devices may include a first safety device 2101 mounted on the tray 201 and a second safety device 2200 mounted on the vehicle body. The first safety device 2101 may be an electrical component mounted on the tray 201, such as a connection port. The second safety device 2200 may be a component mounted on the vehicle body, such as a wiring harness or fuel tank. Safety devices are susceptible to high-temperature safety hazards when exposed to high temperatures. If high-temperature gas is discharged toward the safety device, it will heat up, potentially posing a safety hazard.

[0031] When the battery pack experiences thermal runaway, high-temperature gas is generated inside the battery pack (i.e., within the tray 201's housing). This high-temperature gas is discharged outside the battery pack through explosion-proof valve 2 to prevent excessive pressure inside the battery pack. Cover 3 is mounted over explosion-proof valve 2. The high-temperature gas discharged through explosion-proof valve 2 is contained within cover 3 and discharged externally through air holes 30.

[0032] Among them, the exhaust direction of the high-temperature gas is guided by the air hole 30, so that the high-temperature gas avoids the first safety device 2101 on the tray 201 and the second safety device 2200 on the vehicle body, preventing the high-temperature gas from affecting the first safety device 2101 and the second safety device 2200, thereby improving the explosion-proof performance of the battery pack.

[0033] A first safety device 2101 is provided on the tray assembly 2100. When thermal runaway occurs in the battery pack, high-temperature gas is discharged outward through the explosion-proof valve 2. The high-temperature gas discharged outward through the explosion-proof valve 2 damages the surrounding structural parts, thereby causing a safety accident.

[0034] When the battery pack is used in a vehicle, the battery pack is installed on the vehicle body. A second safety device 2200 is provided on the vehicle body. The second safety device 2200 is provided near the battery pack. When the battery pack discharges high-temperature gas to the outside in a thermal runaway state, the high-temperature gas may cause damage to the second safety device 2200, posing a safety hazard.

[0035] In the present application, the high-temperature gas is guided through the air holes 30 so that the discharged high-temperature gas can avoid the first safety device 2101 and the second safety device 2200, thereby improving the explosion-proof safety of the battery pack.

[0036] In some embodiments of the present application, the cover body 3 is clearance-matched with the explosion-proof valve 2. The cover body 3 and the explosion-proof valve 2 are clearance-matched, and the cover body 3 and the explosion-proof valve 2 are independent of each other and are respectively connected to the tray 201. The clearance can reserve space for gas flow, so that the gas discharged through the exhaust port 22 can flow to the air hole 30 and be discharged outward from the air hole 30.

[0037] A cover 3 is provided on the outside of explosion-proof valve 2. Cover 3 covers explosion-proof valve 2 to protect explosion-proof valve 2, preventing contaminants in the battery pack's application environment from contaminating explosion-proof valve 2 and ensuring its functionality and reliability. The shielding space formed by cover 3 is connected to exhaust port 22, allowing gas discharged through exhaust port 22 to flow into cover 3 and out through air holes 30 in cover 3. Air holes 30 guide the direction of gas discharge, enabling directional gas discharge and enhancing the explosion-proof effectiveness of tray assembly 2100.

[0038] In this application, the explosion-proof valve 2 and the cover 3 are separately fixed to the tray 201, thereby reducing the probability of protection failure of the protective cover. That is, during the assembly process, the explosion-proof valve 2 is first fixed to the tray 201, and then the cover 3 is placed on the explosion-proof valve 2. The cover 3 and the tray 201 are fixedly connected. The explosion-proof valve 2 and the cover 3 are separately installed and assembled separately using the tray 201 as the base. The cover 3 will not fail due to failure of the explosion-proof valve 2, thereby improving reliability and safety.

[0039] In related technologies, the protective cover of the explosion-proof valve is directly mounted on the explosion-proof valve. Due to the size of the explosion-proof valve, the connection strength between the protective cover and the explosion-proof valve is weak and cannot be guaranteed. If a large amount of gas is discharged from the explosion-proof valve, there is a risk that the protective cover and the explosion-proof valve will become detached. Furthermore, if the explosion-proof valve fails, it must be replaced along with the cover, which increases the maintenance cost of the battery pack.

[0040] In this application, the explosion-proof valve 2 and the cover 3 are separately provided and fixed to the tray 201. This improves the impact resistance of the cover 3 and reduces the probability of protection failure. The cover 3 will not fail due to the failure of the explosion-proof valve 2. At the same time, if the explosion-proof valve 2 fails, the cover 3 can be removed and replaced with the explosion-proof valve 2 before reuse, reducing the maintenance cost of the battery pack.

[0041] Referring to Figure 3, the gas inside the cover 3 can be discharged outward through the air holes 30. The air holes 30 guide the direction of gas discharge, which has a higher safety factor than the prior art method of limiting the exhaust direction by using beads. The present application provides air holes 30 on the cover 3 to guide the gas. The air hole 30 guides the gas in a way that has higher mechanical reliability and durability than the method of limiting the exhaust direction by using beads. The long-term aging or functional failure of the beads may change the exhaust direction, causing greater failure and risk.

[0042] In the tray assembly 2100 of the present embodiment, explosion-proof valve 2 and cover 3 are separately disposed on tray 201. This improves cover 3's impact resistance and reduces the probability of protection failure. Cover 3 will not malfunction due to a failure of explosion-proof valve 2. Furthermore, air holes 30 in cover 3 restrict the direction in which gas discharged from explosion-proof valve 2 is discharged, enhancing the explosion-proof effectiveness of tray assembly 2100.

[0043] In some embodiments of the present application, the tray 201 is provided with a first safety device 2101, which is arranged adjacent to the explosion-proof valve 2, and the air hole 30 is arranged to avoid the first safety device 2101 to prevent the high-temperature gas discharged from the explosion-proof valve 2 from damaging the first safety device 2101, thereby improving the safety of the battery pack.

[0044] The first safety device 2101 may be constructed as a low-voltage plug interface, a high-voltage plug interface, or other structures of a battery pack.

[0045] As shown in Figure 1, in some embodiments of the present application, the tray assembly 2100 also includes a mounting seat 4, which is used to install the first safety device 2101, and the mounting seat 4 is installed on the pallet 201. The mounting seat 4 is arranged adjacent to the explosion-proof valve 2, and the opening direction of the air hole 30 avoids the mounting seat 4, so as to guide the gas through the air hole 30 to the side away from the mounting seat 4 and the first safety device 2101 arranged on the mounting seat 4, thereby improving the safety of the tray assembly 2100.

[0046] Mounting base 4 is used to mount and arrange first safety device 2101, thereby forming a discharge port, a charging port, and other port structures on tray 201 to meet the charging and discharging requirements of the battery pack. Referring to Figure 1, since the battery pack connection port is located adjacent to explosion-proof valve 2, explosion-proof valve 2 is suitable for exhausting high-temperature gases within the battery pack in the event of thermal runaway. Air holes 30 are used to limit the direction of exhaust. The opening direction of air holes 30 is arranged to avoid mounting base 4. This can prevent the discharge of high-temperature gases into the connection port and prevent damage to first safety device 2101 at the connection port caused by high-temperature gases, thereby improving the safety of tray assembly 2100.

[0047] Figure 1 shows only a portion of the tray 201, which is part of the side beam and serves as a mounting carrier for the explosion-proof valve 2, the cover 3 and the mounting seat 4. The explosion-proof valve 2 is connected to the accommodating cavity through the side beam, and the electrical components at the mounting seat 4 can be electrically connected to electrical equipment such as batteries in the battery pack.

[0048] In some embodiments of the present application, the cover body 3 includes a cover body 31 and an installation portion 32. The cover body 31 is provided with a cavity, the open end of the cavity faces the side of the tray 201, the air hole 30 is formed on the cover body 31, and the installation portion 32 is provided at the open end of the cover body 31 and is used to connect with the tray 201.

[0049] 2 and 5 , the cover body 31 is used to cover the exhaust port 22 of the explosion-proof valve 2 to prevent the exhaust port 22 of the explosion-proof valve 2 from being exposed and contaminated, thereby reducing the risk of the explosion-proof valve 2 failing due to contamination, and providing good protection for the explosion-proof valve 2. Furthermore, air holes 30 are formed on the cover body 31, and gas discharged into the cover body 31 through the exhaust port 22 can be discharged outward through the air holes 30. At the same time, the cover body 31 can be assembled to the tray 201 through the mounting portion 32, thereby achieving a fixed connection between the cover body 3 and the tray 201.

[0050] In some embodiments of the present application, the cover body 31 includes: a top wall 311 and a side wall 312, the top wall 311 is opposite to the exhaust port 22 and is spaced apart, the side wall 312 is arranged around the top wall 311, and the side wall 312 extends from the top wall 311 to one side of the tray 201 to form the above-mentioned cavity with the top wall 311, and the air hole 30 is arranged on the side wall 312.

[0051] 7 , the air inlet 21 and the exhaust port 22 are respectively arranged at the two ends of the explosion-proof valve 2 in the axial direction. When the top wall 311 and the exhaust port 22 are opposite to each other and spaced apart, the top wall 311 can have a good shielding effect on the exhaust port 22, thereby preventing the exhaust port 22 from being exposed, reducing the risk of contamination of the explosion-proof valve 2, and reserving space for gas discharge between the top wall 311 and the explosion-proof valve 2 to ensure the gas discharge effect at the explosion-proof valve 2.

[0052] The air hole 30 is formed on the side wall 312, thereby avoiding the air hole 30 and the exhaust port 22 being arranged opposite each other, reducing the risk of pollutants entering the cavity through the air hole 30 and contaminating the exhaust port 22, and improving the protection effect of the cover body 3 on the explosion-proof valve 2.

[0053] In some embodiments of the present application, the cover body 31 is constructed as a hemispherical cover structure, and the exhaust port 22 of the explosion-proof valve 2 is opposite to and spaced from the inner wall of the hemispherical structure to ensure the exhaust efficiency of the explosion-proof valve 2. The mounting portion 32 is provided at the opening of the hemispherical structure to engage with the outer wall of the tray 201, ensuring the effective engagement between the cover body 31 and the tray 201.

[0054] The cover body 31 is constructed as a hollow cover structure, which only needs to meet the cover protection requirements of the explosion-proof valve 2. The shape of the cover body 31 can be designed according to needs and is not limited to a square cover or a spherical cover.

[0055] In some embodiments of the present application, the mounting portion 32 is arranged to fit the outer wall surface of the tray 201, and the tray assembly also includes a connecting portion 33, which passes through the mounting portion 32 and is used to fix the mounting portion 32 to the tray 201 to fix the cover body 3 to the tray 201.

[0056] The mounting portion 32 is configured as a mounting plate, which is disposed at the open end of the cover body 31 , such as on the side wall 312 , and extends from the side wall 312 toward a side away from the cavity.

[0057] As shown in FIG. 2 and FIG. 3 , the mounting plate is disposed on the side wall 312 and extends outwardly so as to expose the mounting structure and reduce the difficulty of assembling the cover body 3 .

[0058] The mounting plate is formed with a through hole 321 for the connection portion 33 to pass through. A connection structure corresponding to the through hole 321 is formed on the tray 201. The connection portion 33 is connected and cooperates with the connection structure to fix the cover 3 to the tray 201. The connection portion 33 can be configured as a connecting component such as a bolt.

[0059] The connecting structure is constructed as a mounting protrusion 2011, which is arranged to bulge outward, and the mounting plate is overlapped with the mounting protrusion 2011. The mounting protrusion 2011 is provided with a threaded hole, and the connecting part 33 is constructed as a bolt. The bolt can be passed through the through hole 321 and threadedly engaged with the threaded hole to clamp the mounting plate between the mounting protrusion 2011 and the end of the bolt. The connection method is simple and reliable, and has high connection strength, which can improve the connection reliability between the cover body 3 and the tray 201.

[0060] The structure of the connecting portion 33 is not limited thereto, and may also be constructed as a snap-fit ​​structure (such as a hook, etc.). Accordingly, a snap-fit ​​structure (such as a slot, etc.) is correspondingly provided at the installation position of the tray 201 (such as the side beam).

[0061] In some embodiments of the present application, a notch 3121 is provided on the side wall 312 of the cover body 3, and the notch 3121 is recessed from the edge of the side wall 312 on the open end side toward the side away from the tray 201 to form a space for transition to the mounting plate at the notch 3121. While ensuring that the mounting plate cooperates with the mounting protrusion 2011, the open end of the cover body 31 can be fitted with the mounting surface of the tray 201 (i.e., the outer wall surface of the side beam) to prevent a large amount of high-temperature gas from being discharged from the gap between the cover body 31 and the wall surface at the installation position of the tray 201, thereby improving the cooperation effect between the cover body 31 and the tray 201 and the covering effect of the cover body 31 on the explosion-proof valve 2.

[0062] In some embodiments of the present application, multiple mounting plates are provided, all of which are disposed on the circumferential outer side of the cover body 31. This provides multiple connection locations to improve the connection reliability between the cover body 3 and the tray 201. When the connection method is consistent, a greater number of connection structures increases the connection strength between the cover body 3 and the tray 201, thereby improving the impact resistance of the cover body 3.

[0063] Referring to Figure 1 , there are two mounting plates, one of which is located on the side of the cover body 31 away from the mounting seat 4, and the other of which is located on the underside of the cover body 31. Accordingly, a notch 3121 is formed in the cover body 31 near the mounting plate, which facilitates the mating of the mounting plate with the mounting protrusion.

[0064] When the battery experiences thermal runaway, some of the high-temperature gas in the cover 3 can be discharged through the notch 3121. Therefore, the setting position of the notch 3121 needs to be designed to avoid the mounting seat 4 to prevent the high-temperature gas discharged from the notch 3121 from being discharged to the mounting seat 4 or electrical equipment around the battery pack.

[0065] As shown in FIG. 1 , in some embodiments of the present application, the air hole 30 is provided on a side wall 312 of the cover body 31 facing away from the mounting seat 4 .

[0066] The housing body 31 is rectangular in shape, and the air holes 30 are located on a side wall 312 of the housing body 31, facing away from the mounting seat 4, to direct exhaust toward the side facing away from the mounting seat 4. Of course, the air holes 30 can also be located on the upper or lower side wall 312 of the housing body 31 to prevent high-temperature gas from being discharged toward the mounting seat 4. The opening direction of the air holes 30 needs to be designed in conjunction with surrounding components and equipment to prevent secondary damage caused by the discharged high-temperature steam.

[0067] The shape of the cover body 31 is not limited to a rectangular parallelepiped, and may also be a cylindrical shape, a prism shape, or the like.

[0068] As shown in Figure 2, in some embodiments of the present application, the mounting base 4 includes: a connecting plate 41 and a fixing base 42, the connecting plate 41 is connected to the tray 201, and the fixing base 42 is arranged on the side of the connecting plate 41 away from the tray 201, and is formed with a fixing portion, which is used to fix the first safety device, and the first safety device can be electrically connected to the battery.

[0069] The battery pack needs to be provided with a port to achieve electrical connection with other devices and realize the charging and discharging functions of the battery pack. The connecting plate 41 is used to be connected to the tray 201 to fix the mounting seat 4 to the tray 201. The fixing seat 42 is arranged on the side surface of the connecting plate 41 away from the tray 201 and forms a fixing structure. The fixing structure is used to fix the first safety device to form a connection port of the battery pack at the mounting seat 4.

[0070] In some embodiments of the present application, the connecting plate 41 can be fixedly connected to the tray 201 through a threaded connection component, and the connection method is simple and highly reliable.

[0071] In other embodiments of the present application, the connecting plate 41 may also be connected to the tray 201 by plugging and snapping.

[0072] In some embodiments of the present application, the outer peripheral wall of the explosion-proof valve 2 is provided with a threaded portion 23, which is threadedly connected to the tray 201 to install the explosion-proof valve 2 on the tray 201. The tray 201 is also formed with a threaded structure, which is adapted to the threaded portion 23.

[0073] The explosion-proof valve 2 includes a shell, a threaded portion 23 is formed on the shell, and a head 24 is provided at one end of the shell forming the exhaust port 22. The head 24 is polygonal in shape and size, and can be adapted to a wrench. Therefore, the explosion-proof valve 2 can be assembled to the tray 201 by a wrench, reducing the difficulty of assembling the explosion-proof valve 2.

[0074] In some embodiments of the present application, the explosion-proof valve 2 is constructed to open and release pressure when the pressure inside the battery pack increases to a range of 5KPa-40KPa, so as to avoid explosion due to abnormal internal pressure of the battery pack and ensure the safety of the battery pack.

[0075] In some embodiments of the present application, the cover body 3 is constructed as a metal protective cover, which has high structural strength and good impact resistance and high temperature resistance, such as: it can maintain a temperature of at least 200°C for a period of time (such as 6 minutes) without functional failure.

[0076] According to the battery pack of the embodiment of the present application, the battery pack includes the aforementioned tray assembly 2100, which is provided with an explosion-proof valve 2, a cover 3, and a mounting base 4. By directly connecting the cover 3 to the tray 201, the assembly reliability of the cover 3 is improved, and the protection failure of the cover 3 is prevented. At the same time, the air holes 30 formed in the cover 3 can limit the exhaust direction of the gas, thereby achieving directional exhaust, preventing high-temperature gas from discharging toward the connection port of the battery pack, and improving the safety of the battery pack.

[0077] According to the electric device of the embodiment of the present application, the battery pack of the electric device has high safety. The electric device can be an electric car, etc.

[0078] According to the vehicle of the embodiment of the present application, the vehicle includes a second safety device 2200 and the above-mentioned battery pack. The second safety device 2200 is installed on the vehicle body and is arranged adjacent to the battery pack, and the opening direction of the explosion-proof valve 2 is suitable for avoiding the second safety device 2200 to improve the safety of the vehicle.

[0079] The vehicle is provided with a second safety device 2200 and a battery pack. When the battery pack experiences thermal runaway, a large amount of high-temperature gas will be discharged. The gas will be discharged outward through the explosion-proof valve 2. Due to the structural limitations of the vehicle body, the second safety device 2200 and the battery pack in the vehicle are usually arranged adjacent to each other. In order to improve the safety of the battery pack exhaust process, the air hole 30 can be set to avoid the second safety device 2200 to prevent the high-temperature gas discharged through the explosion-proof valve 2 from being discharged to the second safety device 2200 and causing damage to the second safety device 2200.

[0080] The vehicle may be a new energy vehicle (such as an electric vehicle) or a hybrid vehicle (such as an oil-electric hybrid vehicle).

[0081] When the battery pack is used in an electrical device (or vehicle), the opening direction of the air hole 30 needs to avoid the first safety device, the second safety device and other safety parts around the battery pack to prevent high-temperature gas from causing secondary damage during the discharge process and improve the safety of the electrical device.

[0082] In the related art, when the water inlet and the water outlet on the tray assembly are arranged on the same side, a water inlet mounting hole and a water outlet mounting hole located at the same height are formed on the side wall of the conventional tray assembly. Since the water inlet mounting hole and the water outlet mounting hole are of the same height, shape and size, when the water inlet and the water outlet are assembled on the tray assembly, the water inlet and the water outlet may be assembled incorrectly, that is, the water inlet is assembled into the water outlet mounting hole, and the water outlet is assembled into the water inlet mounting hole, thereby affecting the reliability and safety of the tray assembly;

[0083] The tray assembly 2100 according to an embodiment of the present application is described below with reference to FIG. 5 to FIG. 10 .

[0084] According to the present application, the tray assembly 2100 includes: a tray 201, a water inlet nozzle 13 and a water outlet nozzle 14, the tray 201 is formed with a accommodating cavity for accommodating batteries; the water inlet nozzle 13 and the water outlet nozzle 14, the water inlet nozzle 13 and the water outlet nozzle 14 are respectively formed on the side walls of the tray 201, the minimum distance between the water inlet nozzle 13 and the bottom edge of the side wall is greater than or less than the minimum distance between the water outlet nozzle 14 and the bottom edge of the side wall, the height of the tray 201 is H1, and the distance between the center of the water inlet nozzle 13 and the center of the water outlet nozzle 14 in the height direction of the tray 201 is H2 and satisfies: 0<H2 / H1≤1 / 2.

[0085] As shown in Figure 5, the tray assembly 2100 consists of a tray 201, a water inlet nozzle 13 and a water outlet nozzle 14. A accommodating cavity is formed inside the tray 201, which can be used to accommodate batteries. A water inlet nozzle and a water outlet nozzle 14 are simultaneously provided on one side wall of the tray 201. The distance between the water inlet nozzle 13 and the bottom edge of the side wall of the tray 201 is greater than or less than the distance between the water outlet nozzle 14 and the bottom edge of the side wall of the tray 201. A certain height difference is formed between the water inlet nozzle 13 and the water outlet nozzle 14. The setting position of the water inlet nozzle 13 is higher or lower than the setting position of the water outlet nozzle 14. During the assembly process of the water inlet nozzle 13 and the water outlet nozzle 14, it has a certain anti-mistake effect, which can effectively prevent the water inlet nozzle 13 and the water outlet nozzle 14 from being installed upside down, thereby ensuring the reliability and stability of the tray assembly during operation.

[0086] In some embodiments, the height of the tray 201 is H1, the distance between the center of the water outlet 14 and the center of the water inlet 13 in the height direction of the tray 201 is H2, and the distance between the water inlet 13 and the bottom edge of the side wall of the tray 201 minus the distance between the water outlet 14 and the bottom edge of the side wall of the tray 201 is H2. When the cross-section of the water inlet 14 and the water outlet 13 is a regular shape, H2 is the distance between the geometric center of the water inlet 14 and the geometric center of the water outlet 13 in the height direction. In some embodiments, when the cross-section of the water inlet 13 and the water outlet 13 is a circular shape, H2 is the distance between the center of the water inlet and the center of the water outlet; when the water outlet 13 and When the cross-section of the water outlet 13 is a regular polygon, H2 is the distance between the center of the circumcircle of the water inlet and the center of the circumcircle of the water outlet. When the cross-sections of the water inlet 14 and the water outlet 13 are irregular, the approximate geometric centers of the water inlet 13 and the water outlet 14 are selected, and H2 is the distance between the approximate geometric centers of the water inlet 14 and the water outlet 13 in the height direction. That is, H2 can be the distance between the center of the water inlet 14 and the center of the water outlet 13, or H2 can be the distance between the center of gravity of the water inlet 14 and the center of gravity of the water outlet 13. Where H2 / H1 satisfies the following relationship: 0<H2 / H1≤1 / 2. The units of H1 and H2 are both mm.

[0087] When H2 / H1 satisfies the above-mentioned proportional relationship, it can not only meet the required assembly dimensions between the water inlet nozzle 13 and the water outlet nozzle 14 and the tray assembly 2100, but also ensure that the flow rate difference between the water inlet nozzle and the water outlet nozzle 14 is not too large, so that a certain height difference is formed between the water inlet nozzle 13 and the water outlet nozzle 14. The setting position of the water inlet nozzle 13 is higher or lower than the setting position of the water outlet nozzle 14. During the assembly process of the water inlet nozzle 13 and the water outlet nozzle 14, it has a certain anti-mistake effect, which can effectively prevent the water inlet nozzle 13 and the water outlet nozzle 14 from being installed upside down, thereby ensuring the reliability and stability of the tray assembly during operation.

[0088] According to the tray assembly 2100 of the present application, by setting the ratio H2 / H1 of the height H1 of the tray 201 and the distance H2 between the center of the water inlet nozzle 13 and the center of the water outlet nozzle 14 in the height direction of the tray 201 to be ≤H2 / H1≤1 / 2, it can not only meet the required assembly dimensions between the water inlet nozzle 13, the water outlet nozzle 14 and the tray assembly, but also form a certain height difference between the water inlet nozzle 13 and the water outlet nozzle 14 while ensuring that the flow rate difference between the water inlet nozzle 13 and the water outlet nozzle 14 is not too large. The setting position of the water inlet nozzle 13 is higher or lower than the setting position of the water outlet nozzle 14. During the assembly process of the water inlet nozzle 13 and the water outlet nozzle 14, it has a certain anti-mistake effect, which can effectively prevent the water inlet nozzle 13 and the water outlet nozzle 14 from being installed upside down, thereby ensuring the reliability and stability of the tray assembly during operation.

[0089] According to some embodiments of the present application, H1 satisfies: H1≤100mm, 10mm≤H2≤50mm.

[0090] In some embodiments, the height of the tray 201 is H1, and the distance between the center of the water inlet nozzle 13 and the center of the water outlet nozzle 14 in the height direction of the tray 201 is H2, where H1 is set in the range of H1≤100mm, and where H2 is set in the range of 10mm≤H2≤50mm.

[0091] When H1 and H2 are set within the range of H1≤100mm, 10mm≤H2≤50mm, the required assembly dimensions of the water inlet 13 and the water outlet 14 can be met without increasing the size of the tray 201. While ensuring that the flow rate difference between the water inlet 13 and the water outlet 14 is not too large, a certain height difference is formed between the water inlet 13 and the water outlet 14. The setting position of the water inlet 13 is higher or lower than the setting position of the water outlet 14. During the assembly process of the water inlet 13 and the water outlet 14, it has a certain anti-mistake effect, which can effectively prevent the water inlet 13 and the water outlet 14 from being installed upside down, ensuring the reliability and stability of the tray assembly during operation. The misalignment design of the water inlet 13 and the water outlet 14 in the height direction of the tray assembly can reduce the distance between the water inlet 13 and the water outlet 14 in the width direction of the tray assembly, so as to leave more space in the width direction for assembling other electronic components.

[0092] According to some embodiments of the present application, the minimum distance between the two water spouts is L1, the side wall width of the tray assembly is L2, and the following condition is satisfied: 14≤L2 / L1≤21.

[0093] In some embodiments, the minimum distance between the water inlet 13 and the water outlet 14 is L1, and the width of the side wall of the tray 201 is set to L2, where L1 / L2 satisfies the following relationship: 14≤L2 / L1≤21. The units of L1 and L2 are both mm.

[0094] When L2 / L1 satisfies the above-mentioned proportional relationship, it can not only meet the required assembly dimensions between the water inlet nozzle 1313 and the water outlet nozzle 14 and the tray assembly, but also leave a certain safety distance between the water inlet nozzle 13 and the water outlet nozzle 14 and other components arranged on the side wall of the tray 201, effectively preventing the water inlet and outlet nozzles 14 from interfering with other components on the side wall of the tray 201, thereby improving the stability and safety of the battery pack during operation.

[0095] According to some embodiments of the present application, L1 satisfies: 30 mm ≤ L1 ≤ 100 mm.

[0096] In some embodiments, the minimum distance between the water inlet nozzle 13 and the water outlet nozzle 14 is set to L1, wherein L1 is set in the range of 30 mm ≤ L1 ≤ 100 mm.

[0097] When L1 is set within the range of 30mm≤L1≤100mm, it can not only meet the required assembly dimensions of the water inlet nozzle 13 and the water outlet nozzle 14 and the tray assembly, but also minimize the use of fixing blocks of the water inlet nozzle 13 and the water outlet nozzle 14, thereby reducing manufacturing costs. At the same time, it also leaves a certain safety distance between the water inlet and outlet nozzles 14 and other components arranged on both sides thereof, effectively preventing the water inlet and outlet nozzles 14 from interfering with other components on the tray assembly, thereby improving the stability and safety of the tray assembly 2100 during operation.

[0098] According to some embodiments of the present application, L2 satisfies: 400 mm ≤ L2 ≤ 1500 mm.

[0099] In some embodiments, the width of the side wall of the tray 201 is L2, where L2 is set in the range of 400 mm ≤ L2 ≤ 1500 mm.

[0100] When L2 is set within the range of 400mm≤L2≤1500mm, it can meet the assembly size requirements of the water inlet nozzle 13 and the water outlet nozzle 14, meet the assembly requirements of various electrical equipment, and accommodate more batteries, thereby improving the energy density of the battery pack and improving the endurance of the electrical equipment.

[0101] According to some embodiments of the present application, a first connecting member and a second connecting member are formed on the side wall of the tray 201, and the water inlet 13 and the water outlet 14 are located between the first connecting member and the second connecting member; wherein the distance between the first connecting member and the second connecting member is L3, and satisfies: 0.1≤L1 / L3≤0.9.

[0102] A first connecting member and a second connecting member are formed on a side wall of one side of the tray 201 , and a water inlet 13 and a water outlet 14 are provided between the first connecting member and the second connecting member.

[0103] In some embodiments, the minimum distance between the water inlet 13 and the water outlet 14 is set to L1, and the distance between the first connector and the second connector is L3, where L1 / L3 satisfies the following relationship: 0.1≤L1 / L3≤0.9. The units of L1 and L3 are both mm.

[0104] When L1 / L3 satisfies the above-mentioned proportional relationship, a certain safety distance is left between the water inlet and outlet nozzles 14 and other components arranged on both sides thereof, effectively preventing the water inlet and outlet nozzles 14 from interfering with other components on the tray assembly 2100, thereby improving the stability and safety of the tray assembly 2100 during operation. When L1 / L3 satisfies the above-mentioned proportional relationship, it can not only meet the required assembly dimensions of the water inlet nozzle 13 and the water outlet nozzle 14 and the battery pack liquid cooling system, but also minimize the size of the water nozzle fixing block 12, thereby reducing material consumption and manufacturing costs.

[0105] According to some embodiments of the present application, L3 satisfies: 50 mm ≤ L3 ≤ 1000 mm.

[0106] In some embodiments, the distance between the first connecting member and the second connecting member is L3, wherein L3 is set in the range of 50 mm≤L3≤1000 mm.

[0107] When L3 is set within the range of 50mm≤L3≤1000mm, the distance between the first connector and the second connector meets the assembly dimensions of the water inlet nozzle 13 and the water outlet nozzle 14, and the first connector and the second connector will not interfere with the water inlet nozzle 13 and the water outlet nozzle 14, thereby ensuring the stability and reliability of the battery pack during operation; in addition, in some battery pack structures, other components are arranged between the first connector and the second connector, and L3 is set within the range of 50mm≤L3≤1000mm, and the other components arranged in the first connector and the second connector will not interfere with the water inlet nozzle 13 and the water outlet nozzle 14, thereby ensuring the stable operation of the battery pack.

[0108] According to some embodiments of the present application, the water inlet 13 and the water outlet 14 are constructed as cylinders extending away from the side wall of the tray 201, and the angle between the line connecting the axis of the water inlet 13 and the axis of the water outlet 14 and the bottom surface of the tray 201 is α and satisfies: 0°<α≤45°.

[0109] The water inlet nozzle 13 and the water outlet nozzle 14 are both constructed as cylindrical structures and extend in the direction away from the side wall of the tray 201. The connection between the axis of the water inlet nozzle 13 and the axis of the water outlet nozzle 14 is inclined relative to the bottom surface of the box body. The angle between the line between the axis of the water inlet nozzle 13 and the axis of the water outlet nozzle 14 and the bottom surface of the tray 201 is α, and α is set in the range of: 0°<α≤45°.

[0110] In some embodiments, when 0°<α≤45°, the line connecting the axis of the water inlet nozzle 13 and the axis of the water outlet nozzle 14 is tilted relative to the bottom surface of the tray 201, and the setting positions of the water inlet nozzle 13 and the water outlet nozzle 14 form a certain height difference. When the tray assembly is assembled, the water inlet nozzle 13 and the water outlet nozzle 14 can be positioned more accurately, effectively preventing the water inlet nozzle 13 and the water outlet nozzle 14 from being installed upside down, thereby ensuring the normal operation of the liquid cooling system in the battery pack.

[0111] According to some embodiments of the present application, the minimum distance between the water inlet 13 and the bottom surface of the tray 201 is greater than the minimum distance between the water outlet 14 and the bottom surface of the tray 201 .

[0112] In some embodiments, the minimum distance between the water inlet 13 and the bottom edge of the side wall of the tray 201 is greater than the minimum distance between the water outlet 14 and the bottom edge of the side wall of the tray 201. The water inlet 13 is arranged diagonally above the water outlet 14, and the setting positions of the water inlet 13 and the water outlet 14 are determined, so that the assembler can distinguish the setting positions of the water inlet 13 and the water outlet 14 more quickly and clearly, thereby improving the assembly efficiency of the water inlet 13 and the water outlet 14.

[0113] According to some embodiments of the present application, the minimum distance between the water inlet 13 and the first connecting member is smaller than the minimum distance between the water inlet 13 and the second connecting member; and / or the minimum distance between the water outlet 14 and the first connecting member is larger than the minimum distance between the water outlet 14 and the second connecting member, so that there is a certain space between the water inlet 13 and the first connecting member or between the water outlet 14 and the second connecting member, which can be used to assemble some other components, thereby making the tray assembly structure more compact and more integrated.

[0114] According to some embodiments of the present application, one of the first connecting member and the second connecting member is constructed as a lifting ear 101, the other of the first connecting member and the second connecting member is constructed as an electrical connection port 102, the minimum distance between the water inlet nozzle 13 and the lifting ear is d1, and the minimum distance between the water inlet nozzle 13 and the electrical connection port 102 is d2 and satisfies: d1 ≥ 40 mm, d2 ≥ 40 mm.

[0115] In some embodiments, the first connector can be configured as a lifting lug 101, which can be used to secure and support the battery pack, ensuring that the battery pack is properly positioned, reducing shaking of the battery pack during transportation or in a vibrating environment, and improving the stability of the battery pack during transportation. The second connector can be configured as an electrical connection port 102, through which the tray assembly can be electrically connected to various electrical devices. The electrical connection port 102 can provide power input, transmit current and voltage, and realize power supply to the electrical devices.

[0116] When the water inlet 13 and the water outlet 14 are constructed as regular patterns, the distance between the tangent line perpendicular to the bottom edge of the side wall of the tray 201 in the width direction and tangent to the side of the water inlet 13 close to the ear 101 and the ear 101 is set to d1, and the distance between the tangent line perpendicular to the bottom edge of the side wall of the tray 201 in the width direction and tangent to the side of the water outlet 14 close to the electrical connection port 102 and the electrical connection port 102 is also set to d2, where d1 is set within the range of d1≥40mm, and d2 is set within the range of d2≥40mm.

[0117] When the water inlet nozzle 13 and the water outlet nozzle 14 are constructed into irregular shapes, the distance between the point on the outer surface of the water inlet nozzle 13 closest to the lifting ear 101 and the lifting ear 101 is taken as d1, and the distance between the point on the outer surface of the water outlet nozzle 14 closest to the electrical connection port 102 and the electrical connection port 102 is taken as d2, where d1 is set within the range of d1≥40mm, and d2 is set within the range of d2≥40mm.

[0118] When d1 and d2 are set within the above range, the water inlet nozzle 13 and the water outlet nozzle 14 can be assembled on the tray 201 more conveniently and quickly, and will not interfere with the lifting ear 101 and the electrical connection port 102, so that a certain safe working distance is maintained between the lifting ear 101 and the electrical connection port 102 and the water inlet and outlet nozzles 14, thereby improving the safety and stability of the battery pack during operation.

[0119] According to some embodiments of the present application, the tray 201 includes: a frame 11 and a fixing block 12, the frame 11 is arranged around to define a accommodating cavity, a side wall of the tray 201 is provided on one side of the frame 11, and a fixing hole is formed on the frame 11 that passes through the side wall of the tray 201; the fixing block is accommodated in the fixing hole 111 and at least one end of the fixing block 12 is sealed and connected to the fixing hole 111, and a first hole 121 and a second hole 122 are formed on the fixing block 12, which respectively cooperate with the water inlet nozzle 13 and the water outlet nozzle 14.

[0120] In some embodiments, the tray 201 is composed of a frame 11 and a fixing block 12. The frame 11 is respectively formed with a first open opening and a second open opening at both ends in the thickness direction of the battery pack. A liquid cooling plate 104 is provided on one of the first open opening and the second open opening. The liquid cooling plate 104 can close the first open opening or the second open opening. The frame is arranged around the outer periphery of the condenser plate 104. The liquid cooling plate 104 and the frame 11 jointly define an accommodating cavity. Part of the water inlet nozzle 13 and part of the water outlet nozzle 14 are accommodated in the accommodating cavity, and one end of the water inlet nozzle 13 and the water outlet nozzle 14 are respectively sealed with the liquid cooling plate 104, thereby realizing the flow of the cooling medium in the battery pack and controlling the internal temperature of the battery pack within a safe range through the cooling medium, thereby improving the safety of the battery pack.

[0121] The frame 11 can be constructed as a rectangle, and a tray 201 side wall is formed on one side frame of the rectangular frame 11. A fixing hole 111 is formed on the side wall of the tray 201. The fixing hole 111 is inclined relative to the bottom surface of the tray assembly. The fixing hole 111 passes through the side wall of the tray 201 in the width direction of the tray assembly. The fixing hole 111 and the first connecting member and the second connecting member are arranged on the same side frame, and the fixing hole 111 is arranged between the first connecting member and the second connecting member. A certain receiving space is formed in the fixing hole 111, and the receiving space can be used to receive the fixing block 12. At least part of the outer periphery of the fixing block 12 can be sealed and connected to the fixing hole 111. On the one hand, the movement of the fixing block 12 in the fixing hole 111 can be limited, thereby improving the stability and reliability of the fixing block 12 in the fixing hole 111. On the other hand, it can effectively prevent the internal gas of the battery pack from leaking from the connection between the fixing block 12 and the fixing hole 111, thereby ensuring the safety of the battery pack during operation.

[0122] A first hole 121 and a second hole 122 are formed on the fixing block 12, and the centers of the first hole 121 and the second hole 122 are on the same straight line. The other ends of the water inlet nozzle 13 and the water outlet nozzle 14 are respectively arranged in the first hole 121 and the second hole 122 and extend in the direction away from the frame. Since the fixing block 12 is arranged in the fixing hole 111, the fixing hole 111 is inclined relative to the bottom surface of the tray 201. Therefore, when the fixing block 12 is located in the fixing hole 111, the connecting line between the first hole 121 and the second hole 122 is inclined relative to the bottom surface of the tray 201, which can effectively prevent the water inlet nozzle 13 and the water outlet nozzle 14 from being installed upside down, thereby ensuring the normal operation of the liquid cooling system in the battery pack.

[0123] According to some embodiments of the present application, the first hole 121 and the second hole 122 are configured as circular holes, and the angle α between the line connecting the center of the first hole and the center of the second hole and the bottom surface of the tray 201 satisfies: 0°<α≤45°.

[0124] The water inlet 13 and the water outlet 14 are respectively arranged in the first hole 121 and the second hole 122. The center of the water inlet 13 coincides with the center of the first hole 121, and the center of the water outlet 14 coincides with the center of the second hole 122. The connection between the center of the water inlet 13 and the circle of the water outlet 14 is the line between the center of the first hole 121 and the center of the second hole 122.

[0125] In some embodiments, when 0°<α≤45°, the line between the water inlet nozzle 13 and the water outlet nozzle 14 is tilted relative to the bottom surface of the tray 201, and the setting positions of the water inlet nozzle 13 and the water outlet nozzle 14 form a certain height difference. When the tray assembly 2100 is assembled, the water inlet nozzle 13 and the water outlet nozzle 14 can be positioned more accurately, effectively preventing the water inlet nozzle 13 and the water outlet nozzle 14 from being installed upside down, ensuring the normal operation of the liquid cooling system in the battery pack, and at the same time, the position of the fixing block 12 in the thickness direction of the battery pack is relatively staggered, which can reduce the distance of the fixing block 12 in the width direction of the battery pack, so as to leave more space in the width direction of the frame 11 for assembling other electronic components.

[0126] In other embodiments, when α=0°, the connection between the center of the first hole 121 and the center of the second hole 122 is arranged parallel to the bottom surface of the tray 201, leaving a certain safety distance between the fixing block 12 and the bottom surface of the tray 201 and the top surface of the tray 201. When the water inlet nozzle 13 and the water outlet nozzle 14 are assembled, the water inlet nozzle 13 and the water outlet nozzle 14 are effectively prevented from interfering with the top or bottom components of the tray 201, thereby ensuring the stability and reliability of the battery pack assembly tray assembly 2100.

[0127] According to some embodiments of the present application, the cross section of the fixing block 12 is configured as an oblong.

[0128] In some embodiments, as shown in Figure 7, the cross-sectional area of ​​the fixing block 12 in the length direction of the tray 201 is constructed as an oblong, and a first side, a second side, a third side and a fourth side are formed on the oblong fixing block 12. The first side is arranged parallel to the second side and extends horizontally along the length direction of the battery pack. The third side and the fourth side are respectively arranged at the two ends of the first side and the second side in the length direction of the battery pack, and the third side and the fourth side can be constructed as an arc shape. The oblong fixing block 12 can be placed more tightly in the fixing hole 111. At the same time, when the length, width and height are equal, the volume of the rectangular fixing block 12 is larger than the volume of the oblong fixing block 12. Therefore, compared with the rectangular fixing block 12 set in the traditional battery pack, the oblong fixing block 12 set in the present application uses less material during manufacturing, has a high material utilization rate, and has lower processing and manufacturing costs.

[0129] In addition, the interior of the fixed block 12 can be constructed as a hollow structure. On the one hand, the manufacturing material of the fixed block 12 can be reduced, material can be saved, and the manufacturing cost of the tray assembly 2100 can be reduced. On the other hand, the overall mass of the fixed block 12 is reduced. Since the fixed block 12 is arranged on the battery pack frame 11, the mass of the battery pack frame 11 is reduced, so that the overall mass of the battery pack is reduced, the load weight of the vehicle is reduced, the energy consumption of the vehicle is reduced, and the cruising range of the vehicle is improved.

[0130] According to some embodiments of the present application, the inner end of the fixing block 12 faces the accommodating cavity, and a first weld is formed between the outer periphery of the inner end of the fixing block 12 and the fixing hole 111. The first weld welds and seals the inner end of the fixing block 12 to the inner surface of the frame.

[0131] In some embodiments, a first welding surface 112 and a second welding surface 113 are formed in the fixing hole 111, and the first welding surface 112 and the second welding surface 113 are arranged axially at intervals along the fixing hole 111. The end of the fixing block 12 facing the direction close to the accommodating cavity is the inner end of the fixing block 12, and a first weld is formed between the outer periphery of the inner end of the fixing block 12 and the second welding surface 113. The first weld is a seam formed by utilizing the high temperature of the welding heat source to melt and connect the welding rod and the second welding surface 113 with the metal at the gap at the inner end of the fixing block 12. After the metal at the first weld cools down, the inner end of the fixing block 12 is welded to part of the inner surface of the frame 11. This welding method can form a uniform and continuous sealing layer at the connection between the fixing block 12 and the second welding surface 113. The sealing layer can seal the gap between the inner end of the fixing block 12 and the inner surface of the frame 11, thereby achieving sealing between the inner end of the fixing block 12 and the inner surface of the frame 11.

[0132] In addition, welding can make the fixing block 12 and the frame 11 form a whole. When the battery pack is subjected to external force, the welding connection can better share the stress, prevent the fixing block 12 from falling off from the fixing hole 111, and improve the stability and reliability of the overall structure of the battery pack.

[0133] According to some embodiments of the present application, a first recessed groove surrounding the outer circumference of the fixing block 12 is formed on the inner surface of the frame 11 , and the first weld is disposed in the first recessed groove.

[0134] In some embodiments, a first groove is formed on the second welding surface 113, which is recessed in a radial direction away from the center of the fixing hole 111. The first groove is arranged around the outer periphery of the fixing block 12, and the first weld is accommodated in the first groove, thereby increasing the welding area of ​​the first weld and the fixing block 12 and the fixing hole 111, and improving the stability and reliability of the fixing block 12 in the frame 11; in addition, the first weld is accommodated in the first groove, so that the first weld can be consistent with the fixing block 12 and the inner surface of the frame 11, making the inner surface of the frame 11 smoother and more uniform, avoiding the first weld protruding toward the accommodating cavity during welding, and effectively preventing the first weld from scratching other components in the frame 11. At the same time, it can also reduce the breeding, concealment and accumulation of dirt, and reduce the difficulty of maintaining and cleaning the frame 11.

[0135] According to some embodiments of the present application, the outer end of the fixing block 12 is away from the accommodating cavity, and a second weld is formed between the outer periphery of the outer end of the fixing block 12 and the fixing hole 111. The second weld 124 welds and seals the outer end of the fixing block to the outer surface of the frame 11.

[0136] In some embodiments, the end of the fixed block 12 facing away from the accommodating cavity is the outer end of the fixed block 12, and a second weld 124 is formed between the outer end of the fixed block 12 and the first welding surface 112. The second weld 124 is a seam formed by utilizing the high temperature of the welding heat source to melt the welding rod and the metal at the gap between the first welding surface 112 and the outer end of the fixed block 12. After the metal at the first weld cools down, the outer end of the fixed block 12 and part of the outer surface of the frame 11 are welded together. The first weld can form a uniform and continuous sealing layer at the connection between the fixed block 12 and the first welding surface 112. The sealing layer can seal the gap between the outer end of the fixed block 12 and the inner and outer surfaces of the frame 11, thereby achieving sealing between the outer end of the fixed block 12 and the outer surface of the frame 11.

[0137] In the present application, the fixed block 12 is welded and sealed to the inner and outer surfaces of the frame 11 respectively through the first weld and the second weld 124. On the one hand, this double-layer welding structure can compensate for the problem of weakened strength of the fixed block 12 when the fixed block 12 is constructed as a central control structure, thereby improving the stability of the structure between the frame 11 and the fixed block 12. On the other hand, the form of the sealing connection between the fixed block 12 and the frame 11 is relatively simple, the process quality control is easy, the sealing failure risk index is low, and the sealing between the fixed block 12 and the frame 11 is improved.

[0138] According to some embodiments of the present application, according to some embodiments of the present application, the cross-sectional area of ​​the outer end of the fixed block 12 gradually decreases in the direction away from the tray 201, so that a bevel 123 is formed on the outer periphery of the outer end of the fixed block 12, and an accommodating gap is formed between the bevel 123 of the fixed block 12 and the first welding surface 112, and the second weld 124 can be accommodated in the accommodating gap. On the one hand, the welding area of ​​the second weld 124 and the fixed block 12 and the frame 11 can be increased, thereby improving the stability and reliability of the fixed block 12 in the frame 11. On the other hand, the second weld 124 can be made flush with the end face of the outer end of the fixed block 12, and the second weld 124 is consistent with the outer surface of the fixed block 12 and the frame 11, so that the outer surface of the frame 11 is smoother and more uniform, thereby improving the overall appearance of the battery pack, while also reducing the breeding, concealment and accumulation of dirt, and reducing the difficulty of maintaining and cleaning the frame 11.

[0139] According to some embodiments of the present application, the water inlet nozzle 13 includes: a first bend pipe 132 and a first connector 131, one end of the first bend pipe 132 is suitable for connecting to the liquid cooling plate 104; the first connector is arranged at the other end of the first bend pipe 132 and passes through the first hole 121 and is sealedly connected to the first hole 121; the water outlet nozzle 14 includes: a second bend pipe 142 and a second connector 141, one end of the second bend pipe 142 is suitable for connecting to the liquid cooling plate 104; the second connector is arranged at the other end of the second bend pipe 142 and passes through the second hole 122 and is sealedly connected to the second hole 122.

[0140] In some embodiments, the water inlet nozzle 13 is composed of a first elbow 132 and a first connector 131. One end of the first elbow 132 can be welded to the liquid cooling plate 104, and the other end of the first elbow 132 is welded to one end of the first connector 131. The other end of the first connector 131 passes through the first hole 121 and extends in a direction away from the first hole 121. The outer periphery of the first connector 131 is welded and sealed to at least part of the inner surface of the first hole 121, thereby achieving a sealed connection between the water inlet nozzle 13 and the fixed block 12, effectively preventing gas from entering the battery pack. The leakage of the body from the connection between the water inlet nozzle 13 and the first hole 121 is improved, and the stability of the battery pack operation is improved. The first bend pipe 132 and the first connector 131 and the liquid cooling plate 104 are not added in an integrated machine. The first bend pipe 132 can be constructed as a standard part, which can not only mass-produce the first bend pipe 132 but also ensure the quality of the first bend pipe 132 and reduce the manufacturing cost of the first bend pipe 132. When the battery pack is mass-produced, the consistency of the size, shape and connection method of the first bend pipe 132 can also be ensured, thereby improving the production efficiency of the battery pack.

[0141] The water outlet 14 is composed of a second elbow 142 and a second connector 141. One end of the second elbow 142 can be welded to the liquid cooling plate 104, and the other end of the second elbow 142 is welded to one end of the second connector 141. The other end of the second connector 141 passes through the second hole 122 and extends in a direction away from the second hole 122. The outer periphery of the second connector 141 is welded and sealed to at least part of the inner surface of the second hole 122, thereby achieving a sealed connection between the water outlet 14 and the fixing block 12, effectively preventing the gas inside the battery pack from entering the battery pack from the second connector 122. 41 and the second hole 122 are leaked, which improves the stability of the battery pack operation. The second bend pipe 142 and the second connector 141 and the liquid cooling plate 104 are not added in an integrated machine. The second bend pipe 142 can be constructed as a standard part, which can not only mass-produce the second bend pipe 142 but also ensure the quality of the second bend pipe 142 and reduce the manufacturing cost of the second bend pipe 142. When the battery pack is mass-produced, the consistency of the size, shape and connection method of the second bend pipe 142 can also be ensured, thereby improving the production efficiency of the battery pack.

[0142] According to some embodiments of the present application, a first mating protrusion extending in the radial direction is formed on the outer periphery of the first connector 131, and the first mating protrusion is mated with the first hole 121. A third weld 133 is formed on the outer end of the fixing block 12 and is arranged around the outer periphery of the first mating protrusion. The third weld 133 is suitable for sealing the first mating protrusion and the first hole 121. A second mating protrusion 144 extending in the radial direction is formed on the outer periphery of the second connector 141, and the second mating protrusion 144 is mated with the second hole 122. A fourth weld 143 is formed on the outer end of the fixing block 12 and is arranged around the outer periphery of the second mating protrusion 144. The fourth weld 143 is suitable for sealing the second mating protrusion 144 and the second hole 122.

[0143] In some embodiments, a first mating protrusion is formed on the first connector 131 and is arranged around the outer periphery of the first connector 131. The first mating protrusion extends radially on the first connector 131, and the first mating protrusion is in contact with the inner circumferential wall of the first hole 121. A third weld 133 is formed on the outer end of the fixing block 12. The third weld 133 welds the outer end face of the fixing block 12 to part of the circumferential wall of the first mating protrusion, and can close the gap at the connection between the first hole 121 and the first mating protrusion, thereby achieving sealing between the first hole 121 and the first mating part, effectively preventing the internal gas of the battery pack from leaking from the connection between the second connector 141 and the second hole 122, and improving the stability of the battery pack operation.

[0144] A second mating protrusion 144 is formed on the second connector 141 and is arranged around the outer periphery of the second connector 141. The second mating protrusion 144 extends radially on the second connector 141. The second mating protrusion 144 is in contact with the inner peripheral wall of the second hole 122. A fourth weld 143 is formed on the outer end of the fixing block 12. The fourth weld 143 welds the outer end face of the fixing block 12 and part of the peripheral wall of the second mating protrusion 144 together, and can close the gap at the connection between the second hole 122 and the second mating protrusion 144, thereby realizing the sealing between the second hole 122 and the second mating part, effectively preventing the internal gas of the tray assembly 2100 from leaking from the connection between the second connector 141 and the second hole 122, and improving the stability of the battery pack operation.

[0145] In addition, compared with the method of using sealing washers and nuts in traditional tray assemblies to fix and seal the water inlet and outlet nozzles 14, the present application uses a third weld 133 and a fourth weld 143 to seal and fix the water inlet nozzle 13 and the water outlet nozzle 14 to the fixed block 12 respectively. This sealing method has a simple structure, easy process quality control, and a low sealing failure risk index. It can ensure the sealing between the fixed block 12 and the water inlet and outlet nozzles 14 during long-term use. At the same time, it can also reduce the assembly difficulty between the water inlet and outlet nozzles 14 and the fixed block 12, thereby improving the assembly efficiency of the battery pack.

[0146] According to some embodiments of the present application, the angle between one end of the first bend 132 and the other end of the first bend 132 is β1, and the angle between one end of the second bend 142 and the other end of the second bend 142 is β2, and they respectively satisfy: 70°≤β1≤110°, 70°≤β2≤110°.

[0147] In some embodiments, the angle between one end of the first bend 132 and the other end of the first bend 132 is set to β1, and the angle between one end of the second bend 142 and the other end of the second bend 142 is set to β2, wherein β1 is set in the range of 70°≤β1≤110°, and β2 is set in the range of 70°≤β2≤110°.

[0148] When β1 and β2 are set within the above range, the internal space of the accommodating cavity occupied by the first bend 132 and the second bend 142 is smaller, and will not interfere with other components housed in the accommodating cavity, thereby ensuring the stability of the battery pack liquid cooling system. At the same time, the external temperature sensor 103 can be directly mounted on the outer periphery of the first bend 132 and the second bend 142, without the need for additional processing of mounting holes on the first bend 132 and the second bend 142, thereby reducing the manufacturing cost of the battery pack.

[0149] According to some embodiments of the present application, the thickness of the fixing block 12 is h and satisfies 3 mm ≤ h ≤ 5 mm.

[0150] In some embodiments, the thickness h of the fixed block 12 is set within the range of 3mm≤h≤5mm, which can minimize the manufacturing material of the fixed block 12 while ensuring the structural strength of the fixed block 12, so that the fixed block 12 can stably support the water inlet nozzle 13 and the water outlet nozzle 14, thereby ensuring the stability of the liquid cooling system during operation.

[0151] The battery pack according to the present application is briefly described below.

[0152] The battery pack according to the present application is provided with the tray assembly 2100 described in any one of the above embodiments. Since the battery pack according to the present application is provided with the tray assembly 2100 described in any one of the above embodiments, the battery pack according to the present application has better sealing, stronger stability and reliability, and lower manufacturing cost.

[0153] The following briefly describes the electrical equipment according to the present application.

[0154] The electric equipment according to the present application is provided with the battery pack described in any one of the above embodiments. Since the electric equipment according to the present application is provided with the battery pack described in any one of the above embodiments, the battery pack provided on the electric equipment according to the present application has better sealing, stronger stability, and lower manufacturing cost, and has good safety and high reliability during vehicle operation, while also reducing the manufacturing cost of the electric equipment.

[0155] In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0156] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature identified as "first" or "second" may explicitly or implicitly include one or more of the features. Throughout the description of this application, "plurality" means more than two, unless otherwise specifically defined.

[0157] In this application, unless otherwise expressly specified or limited, terms such as "mounted," "connected," "connect," and "fixed" should be understood in a broad sense. For example, they may refer to fixed connections, detachable connections, or integration; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; and internal connections between two components or interactions between two components. Those skilled in the art will understand the specific meanings of these terms in this application based on specific circumstances.

[0158] In this application, unless otherwise expressly specified or limited, when a first feature is "above" or "below" a second feature, it may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Furthermore, when a first feature is "above," "above," or "above" a second feature, it may mean that the first feature is directly above or diagonally above the second feature, or simply means that the first feature is at a higher level than the second feature. When a first feature is "below," "below," or "below" a second feature, it may mean that the first feature is directly below or diagonally below the second feature, or simply means that the first feature is at a lower level than the second feature.

[0159] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art can combine and combine different embodiments or examples described in this specification and features of different embodiments or examples without contradiction.

[0160] Although the embodiments of the present application have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be understood as limitations on the present application. Ordinary technicians in this field can change, modify, replace and modify the above embodiments within the scope of the present application.

Claims

1. A tray assembly, comprising: A tray (201), the tray (201) having a receiving cavity, the receiving cavity being used to receive a battery; an explosion-proof valve (2), the explosion-proof valve (2) being arranged on the tray (201) and used for discharging high-temperature gas in the tray (201) to the outside; A cover body (3), the cover body (3) is arranged on the explosion-proof valve (2), and the cover body (3) is provided with an air hole (30), and the air hole (30) is used to change the exhaust direction so that the discharged high-temperature gas avoids the tray (201) and / or the safety device on the vehicle body.

2. The tray assembly according to claim 1, wherein: The tray (201) is provided with a first safety device, the first safety device is arranged adjacent to the explosion-proof valve, and the high-temperature gas discharged through the air hole (30) avoids the first safety device.

3. The tray assembly according to claim 2, wherein: The cover body (3) comprises: A cover body (31), the cover body (31) having a cavity, the open end of the cavity facing one side of the tray (201), and the air hole (30) being formed on the cover body (31); A mounting portion (32), wherein the mounting portion (32) is disposed at the open end of the cover body (31) and is used to be connected to the tray (201).

4. The tray assembly according to claim 3, wherein: The cover body (31) comprises: Top wall (311); A side wall (312), wherein the side wall (312) is arranged around the top wall (311) and extends from the top wall (311) toward one side of the tray (201) to form the cavity together with the top wall (311), and the air hole (30) is arranged on the side wall (312).

5. The tray assembly according to claim 3, wherein: The cover body (31) is constructed in a hemispherical shape, and the mounting portion (32) is arranged at an opening of the hemispherical shape.

6. The tray assembly according to claim 4 or 5, wherein: The mounting portion (32) is disposed in close contact with the outer wall surface of the tray (201); The tray assembly further comprises a connecting portion (33), wherein the connecting portion (33) is disposed through the mounting portion (32) and is used to fix the mounting portion (32) to the tray (201).

7. The tray assembly according to any one of claims 3 to 6, wherein: The air hole (30) is arranged on a side wall (312) of the cover body (31) that is away from the first safety device.

8. The tray assembly according to any one of claims 2 to 7, wherein: The tray (201) is provided with a mounting seat (4), the first safety device is mounted on the mounting seat (4), the mounting seat (4) is arranged adjacent to the explosion-proof valve (2), and the mounting seat (4) comprises: A connecting plate (41), wherein the connecting plate (41) is connected to the tray (201); A fixing seat (42), the fixing seat (42) being arranged on a side of the connecting plate (41) away from the tray (201) and having a fixing portion, the fixing portion being used to fix the first safety device, the first safety device being electrically connected to the battery.

9. The tray assembly according to any one of claims 1 to 8, wherein: The outer peripheral wall of the explosion-proof valve (2) is provided with a threaded portion (23), and the threaded portion (23) is threadedly connected to the tray (201).

10. A tray assembly, comprising: A tray (201), wherein the tray (201) is formed with a receiving cavity for receiving a battery; a water inlet (13) and a water outlet (14), wherein the water inlet (13) and the water outlet (14) are respectively formed on the side wall of the tray (201), and the minimum distance between the water inlet (13) and the bottom edge of the side wall is greater than or less than the minimum distance between the water outlet (14) and the bottom edge of the side wall, The height of the tray (201) is H1, and the distance between the center of the water inlet nozzle (13) and the center of the water outlet nozzle (14) in the height direction of the tray (201) is H2 and satisfies: 0<H2 / H1≤1 / 2.

11. The tray assembly according to claim 10, wherein: The H1 satisfies: H1≤100mm, 10mm≤H2≤50mm.

12. The tray assembly of claim 10, wherein: The minimum distance between the two water nozzles is L1, the width of the side wall of the tray (201) is L2, and the following condition is satisfied: 14≤L2 / L1≤21.

13. The tray assembly of claim 12, wherein: L1 satisfies: 30mm≤L1≤100mm.

14. The tray assembly according to claim 12 or 13, wherein: L2 satisfies: 400mm≤L2≤1500mm.

15. The tray assembly according to any one of claims 12 to 14, wherein: A first connecting member and a second connecting member are formed on the side wall of the tray (201), and the water inlet (13) and the water outlet (14) are located between the first connecting member and the second connecting member; in The distance between the first connecting member and the second connecting member is L3, and satisfies: 0.1≤L1 / L3≤0.

9.

16. The tray assembly of claim 15, wherein: L3 satisfies: 50mm≤L3≤1000mm.

17. The tray assembly according to any one of claims 10 to 16, wherein: The water inlet (13) and the water outlet (14) are constructed as cylinders extending away from the side wall of the tray (201), and the angle between the line connecting the axis of the water inlet (13) and the axis of the water outlet (14) and the bottom surface of the tray (201) is α and satisfies: 0°<α≤45°.

18. The tray assembly of claim 17, wherein: The minimum distance between the water inlet nozzle (13) and the bottom surface of the tray (201) is greater than the minimum distance between the water outlet nozzle (14) and the bottom surface of the tray (201).

19. The tray assembly of claim 15, wherein: The minimum distance between the water inlet nozzle (13) and the first connecting member is smaller than the minimum distance between the water inlet nozzle (13) and the second connecting member; and / or The minimum distance between the water outlet nozzle (14) and the first connecting member is greater than the minimum distance between the water outlet nozzle (14) and the second connecting member.

20. The tray assembly of claim 15, wherein: One of the first connecting member and the second connecting member is configured as a lifting ear (101), the other of the first connecting member and the second connecting member is configured as an electrical appliance connection port (102), the minimum distance between the water inlet nozzle (13) and the lifting ear (101) is d1, the minimum distance between the water inlet nozzle (13) and the electrical appliance connection port (102) is d2, and the following conditions are satisfied: d1≥40 mm, d2≥40 mm.

21. The tray assembly according to any one of claims 10 to 20, wherein: The tray (201) comprises: a frame (11), the frame (11) being arranged around to define a receiving cavity, a side wall of the tray (201) being arranged on one side of the frame (11), and a fixing hole (111) penetrating the side wall of the tray (201) being formed on the frame (11); A fixing block (12), the fixing block (12) being received in the fixing hole (111) and at least one end of the fixing block (12) being sealedly connected to the fixing hole (111), the fixing block (12) being formed with a first hole (121) and a second hole (122) respectively cooperating with the water inlet nozzle (13) and the water outlet nozzle (14).

22. The tray assembly of claim 21, wherein: The first hole (121) and the second hole (122) are constructed as circular holes, and the angle between the line connecting the center of the first hole (121) and the center of the second hole (122) and the bottom surface of the tray (201) is α and satisfies: 0°<α≤45°.

23. A tray assembly according to claim 21 or 22, wherein: The cross section of the fixing block (12) is in the shape of an oblong circle.

24. The tray assembly according to any one of claims 21 to 23, wherein: The inner end of the fixing block (12) faces the accommodating cavity, and a first weld is formed between the outer periphery of the inner end of the fixing block (12) and the fixing hole (111), wherein the first weld welds and seals the inner end of the fixing block (12) and the inner surface of the frame (11).

25. The tray assembly of claim 24, wherein: The inner surface of the frame (11) is formed with a first recessed groove surrounding the outer circumference of the fixing block (12), and the first welding seam is arranged in the first recessed groove.

26. The tray assembly of claim 24, wherein: The outer end of the fixing block (12) faces away from the accommodating cavity, and a second weld (124) is formed between the outer periphery of the outer end of the fixing block (12) and the fixing hole (111), and the second weld (124) welds and seals the outer end of the fixing block (12) and the outer surface of the frame (11).

27. The tray assembly of claim 26, wherein: The cross-sectional area of ​​the outer end of the fixing block (12) gradually decreases in a direction away from the tray (201), so that an inclined surface (123) is formed on the outer periphery of the outer end of the fixing block (12), and the second weld (124) is located between the inclined surface (123) and the inner wall of the fixing hole (111).

28. The tray assembly according to any one of claims 21 to 27, wherein: The water inlet nozzle (13) comprises: A first curved pipe (132), one end of the first curved pipe (132) being suitable for being connected to the liquid cooling plate (104); a first connector, the first connector being arranged at the other end of the first curved pipe (132) and passing through the first hole (121) and being sealed and connected to the first hole (121); The water outlet (14) comprises: A second curved pipe (142), one end of the second curved pipe (142) being suitable for being connected to the liquid cooling plate (104); A second connector is arranged at the other end of the second curved pipe (142) and passes through the second hole (122) and is sealed and connected to the second hole (122).

29. The tray assembly of claim 28, wherein: The outer periphery of the first connector is formed with a first mating protrusion extending in the radial direction, the first mating protrusion is mated with the first hole (121), the outer end of the fixing block (12) is formed with a third weld (133) surrounding the outer periphery of the first mating protrusion, the third weld (133) is suitable for sealing the first mating protrusion and the first hole (121); A second mating protrusion (144) extending in the radial direction is formed on the outer periphery of the second connector, and the second mating protrusion (144) is mated with the second hole (122). A fourth weld (143) is formed on the outer end of the fixing block (12) and is arranged around the outer periphery of the second mating protrusion, and the fourth weld (143) is suitable for sealing the second mating protrusion (144) and the second hole (122).

30. The tray assembly of claim 29, wherein: The angle between one end of the first curved pipe (132) and the other end of the first curved pipe (132) is β1, and the angle between one end of the second curved pipe (142) and the other end of the second curved pipe (142) is β2, and they respectively satisfy: 70°≤β1≤110°, 70°≤β2≤110°.

31. The tray assembly of claim 21, wherein: The thickness of the fixing block (12) is h and satisfies 3mm≤h≤5mm.

32. A battery pack, comprising the tray assembly (2100) according to any one of claims 1-31.

33. An electrical device, comprising the battery pack according to claim 32.

34. A vehicle comprising: A battery pack, the battery pack comprising a tray assembly according to any one of claims 1 to 9; A second safety device is installed on the vehicle body and is arranged adjacent to the battery pack, and the opening direction of the air hole (30) is suitable for avoiding the second safety device.

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